﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _11._7
{
    internal class Program
    {
        static void Main(string[] args)
        {
            TestClass t1= new TestClass();
            TestClass t2= new TestClass();
        
            t1.val = 1; t2.val = 2;
            TestClass t3 = t1 + t2;
            Console.WriteLine( t3.val.ToString() + (-t2).val );

            Console.ReadLine();
        }
    }
}
